JPS5738013A - Receiver - Google Patents

Receiver

Info

Publication number
JPS5738013A
JPS5738013A JP11350580A JP11350580A JPS5738013A JP S5738013 A JPS5738013 A JP S5738013A JP 11350580 A JP11350580 A JP 11350580A JP 11350580 A JP11350580 A JP 11350580A JP S5738013 A JPS5738013 A JP S5738013A
Authority
JP
Japan
Prior art keywords
detector
output
signal
amplifying stage
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11350580A
Other languages
Japanese (ja)
Inventor
Kazuo Watanabe
Masanori Ienaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11350580A priority Critical patent/JPS5738013A/en
Publication of JPS5738013A publication Critical patent/JPS5738013A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To achieve the suppression of an interference signal by forming an AGC voltage through the provision of the 2nd detector having lower selectivity than that of the detector forming an output signal to a reception signal at the output side of an IF amplifying stage. CONSTITUTION:A instage selective element 7 is provided at the output of an IF amplifying stage 6 via a resistor R25, the output is applied to a detector 9a to a reception signal to detect the input signal of narrow band formed under the high selectivity by the element 7. On the other hand, the output signal of the IF amplifying stage side of the resistor R25 is inputted to a detector 9b being a signal having broader frequency band than the input signal of the detector 9a through the selectivity of the element 7 lowered due to the insertion of the resistor R25. The output of the detector 9b is smoothed at an AGC filter 14 to form an AGC voltage 12 to control the gain of the IF amplifying stage 6 and the RF amplifying stage.
JP11350580A 1980-08-20 1980-08-20 Receiver Pending JPS5738013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11350580A JPS5738013A (en) 1980-08-20 1980-08-20 Receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11350580A JPS5738013A (en) 1980-08-20 1980-08-20 Receiver

Publications (1)

Publication Number Publication Date
JPS5738013A true JPS5738013A (en) 1982-03-02

Family

ID=14614021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11350580A Pending JPS5738013A (en) 1980-08-20 1980-08-20 Receiver

Country Status (1)

Country Link
JP (1) JPS5738013A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1519481A1 (en) * 2002-07-03 2005-03-30 Kabushiki Kaisha Toyota Jidoshokki Agc circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345250A (en) * 1976-10-05 1978-04-22 Sanyo Electric Co Ltd Anisotropic diffusing plate

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345250A (en) * 1976-10-05 1978-04-22 Sanyo Electric Co Ltd Anisotropic diffusing plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1519481A1 (en) * 2002-07-03 2005-03-30 Kabushiki Kaisha Toyota Jidoshokki Agc circuit
EP1519481A4 (en) * 2002-07-03 2007-07-18 Toyota Jidoshokki Kk Agc circuit

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